How to quickly understand a new job's security architecture

Hi all,

First time posting here, I was having trouble finding good answers via google so thought I'd turn to reddit.

Essentially I'm looking for a checklist of things to ask my new employer in my first week in their cybersecurity team to understand the security of their whole environment as quickly as possible before I get distracted by any of the office politics, "too hard basket" issues, "don't have funding", or any of the other justifications that always exist …

architecture checklist cybersecurity cybersecurity team don employer environment funding google hard job new job office politics quickly reddit security security architecture team things thought turn understand